/Engine/Source/Runtime/InteractiveToolsFramework/Public/BaseGizmos/GizmoElementRenderState.h
Set material value and override flag.
void SetMaterial ( [TWeakObjectPtr](API\Runtime\Core\UObject\TWeakObjectPtr)< [UMaterialInterface](API\Runtime\Engine\Materials\UMaterialInterface) > InColor, bool InOverridesChildState )